. >> they hit us hard. i had four guitars stolen. i had both of our laptops, i had my grammy medal stolen. >> reporter: flynn earned a grammy nomination for his band machinehead for the 2007 release "the blackening." he believes whoever did this knew what was inside his home. one was a mini-guitar he gave to his eldest son. the other, the one he wrote songs and toured with back in '94. >> the other one was a washburn dime bolt that was given to me by the late dimebag darrell. this guitar was incredibly sentimental. we had one tip from the corner here, a green teal american-made pickup truck ta drove very slowly up around the corner, came back, drove very slowly. >> reporter: flynn is hoping that a tip and fingerprints taken from two remaining guitars leads to an arrest. he is offering a reward for each guitar. in fact, he is offering two rewards. $1,000 for the return of one of his guitars. $2,000 for the other. but he says, of course, to him his guitars are priceless. reporting live in martinez, i'm cheryl hurd, nbc bay area news. >